Spindle brake

Abstract

A spindle brake for a spinning or twisting machine has a pair of arms whose jaws are engageable with the whorl of a spinning or twisting spindle. One of these arms carries a belt-lifting roller adapted to lift the belt away from the whorl when the brake is actuated thereby preventing friction between the belt and the immobilized whorl.

We claim: 
     
       1. A spindle brake for a spinning or twisting spindle of the type in which a tangential belt engages a whorl on a spinning or twisting machine, said brake comprising: a pair of brake jaws juxtaposed with one another across said whorl;   respective arms carrying said jaws, said arms being connected at one end by a common pivot so that said arms are swingable toward and away from each other about said pivot;   means for actuating said brake to swing said arms toward each other and engage said jaws with said whorl;   a belt-lifting roller at the other end of one of said arms engageable with said belt upon actuation of the brake to lift said belt from said whorl; and   a spreading spring biasing said arms away from one another, said pivot and said arms being mounted upon a support plate removably attachable to said machine.   
     
     
       2. The brake defined in claim 1 wherein said actuating means includes a lever-cam means for swinging said arms toward one another. 
     
     
       3. The brake defined in claim 1 wherein said plate is provided with at least one guide pin for locating said brake on said machine, said machine having a plurality of spindles with respective locations adapted to receive said pin, whereby said brake can be removed from position to position along said machine. 
     
     
       4. The brake defined in claim 1, further comprising magnetic means for retaining said plate on said machine. 
     
     
       5. A spindle brake for a spinning or twisting spindle of the type in which a tangential belt engages a whorl on a spinning or twisting machine, said brake comprising: a support plate removably attachable to said machine;   a pair of brake jaws juxtaposed with one another across said whorl;   respective arms carrying said jaws, said arms being connected at one end by a common pivot so that said arms are swingable toward and away from each other about said pivot, said pivot mounting said arms on said support plate;   lever and cam means engageable with said pivot, and said arms on said plate for swinging said arms toward each other and engaging said jaws with said whorl; and   a belt-lifting roller at a free end of one of said arms engageable with said belt upon actuation of the brake to lift said belt from said whorl.   
     
     
       6. The brake defined in claim 5 wherein said plate is provided with at least one guide and for locating said brake on said machine, said machine having a plurality of spindles with respective locations adapted to receive said pin, whereby said brake can be moved from position to position along said machine. 
     
     
       7. The brake defined in claim 5, further comprising magnetic means for retaining said plate on said machine.